THI LÝ L1-2011(NGUYỄN TẤT THÀNH HN)

VAt quay nhanh dAn dAu, sau d6 chuy6n sang quay dAu ' CAu 2: MQt thanh rninh d6ng ctrdt ti€t diQn d0u, ttr6i tucrng m, chiAu dai l, cd ttrd quay xung quanh 1 trUc rrim ngang di qua 1- di

C J2I , D- Jri {d

DAI HoC SUPHAIvI HA NOr

TRUdNG THPT NGI"TYEN TAT TUANH

chay thing khi nhi€t d0 ld :

Ki THI THUDAI HoC, CAO DANG T,AN T

NAM 2Or1

MON vAr li

Thdi gian: 90 phrti fthdng kd tha gion phdt de)

MA DE 101

CAu 1: MQt vdt rin c6 truc qpay c.o dinh ban dAu dang d,?og y€n T6c dUng vdo vg.t rin i

^. - r ' *o

ldm kh6ng aOi ei6t ring mdmen cin rf le voi t6c d0 g6c Hoi vit s€'chuy6n

momen luc co do

dQng nhu thti ndo?

A.Vat qryy nhanh dAn d€u

B Ban dAu vgt quay nhanh dAn, sau d6 chflm dAn r6i drmg l4i

C Vft quay nhanh din, s-au t16 chuytin sqnB quay d6u

D VAt quay nhanh dAn dAu, sau d6 chuy6n sang quay dAu '

CAu 2: MQt thanh rninh d6ng ctrdt ti€t diQn d0u, ttr6i tucrng m, chiAu dai l, cd ttrd quay xung quanh 1 trUc rrim ngang di qua 1- diu thanh vi vudng g6c vtri thanh B6 qua *u ,6t-d t o"

quay vi sr?c cin mdi trubng Gia tdc rcri ttr do id g N6u thanh dugc tha kh6ng vfln tdc ban dAu

tu vi u: nim ogang thi khi tdi vi tri thdng dung thanh c5 tOC dQ g6c , bing : l

Cf;u 3: M-Qt mdmen lgc c6 d0 lcrn 6Nm tdc dr.rng vio I vf;t rin c6 rnOmen qudn tinh a5; vOi t4rc quay bing 2 kg.m2 ThcridiSm ban dAir khi t6c dung m6men lgc, v6t dang quay voi tdc d0

^l^ ra\-^l/- cr^ rA- -'tr :+-' ^i - ,{4 - ' ^^ at

^A ,

goc iiiracis 5au iUs v?t OAr loc (i!, goc rurao/s- rrq r(nl momen can tac OUng len viit lii :

Ciu 4: MQt chdt tli6m dao dQng diAu hda voi bi€n dp A, chu lc! T Tdc dQ trung binh lcin nhit

mi v6t d4t duo c trong l/o chv k! ld:

4'.JZ Jt

ciu 5: MQt ch6t diiSm dao dong diAu hda theo phuong trinh: x=*cosis;rr-fit"t

Thoi diilm thri l0l vat di qua vi tri c6 lV ttO x:ZJl ctn ld:

7ZA2

-t

A 50

1?01

B -E6-5

1204

c -co-s i

1?03 ":'

D -60-s :'

CAu 6: LAn lust treo 2 vft c6 khiii luong m1 vi m2 vdo I ld xo c6 dQ cfmg k = 40 (N/m) vd

kich thich cho chring dao dQng diAu hod Trong cing mQt h9*g thdi gian nh6t ttinh m1 thgc hi€n dugc 20 dao tl$ng vi m2 thUc hi$n duqc l0 dao clsng; N6u cring treo ci 2 vQIvdo lo xo thi

chu kj,dao dQng cria hf b-e z (s); m1, m2 c6 gi6 {a lin luqt :

A.2kg ; 0,5kg B.0,5kg ;Zkg C lkg, ;0,5kg D.0,5kg ; lkg

Cflu 7: MQt con l5c ld xo ngang, ld xo c6 t10 cring k:2N/cm, Kich thfch cho v{t OObH vsi

phuong trinh .r : 6 cos{*rf *

"1"* I(e tt hic khio *t a"o dO.tg, sau khoing thoi graat=480(s)

v6tttiduo.cqudngduongdAil5cm.L6y,z7:10.xtroiluqrr8criavftba"g-.'.

Cflu 8: T4i noi ngang bing mgc nudc bi€n, d nhi€t dO 200C, I dOng hO qui lic frong I ngdy chay nhanh 6,48 s, thanh treo con lic c6 h0 sO ns ddi ],: 2.10-5 K-r.O v! tri n6i tr6n dong hd

*c

8.7

CAu 9: N'{6t'con lic don duerc freo 0 trAn I thang

ryd-v Khi trrang mdy dinrg y€n n6 dao ti6hg di€u hod vsi chu It T, khi thang-md1, di xudng ina"! dong, 9.hA; aAn acri"oi gi;;*-J;;=

lon bing 1/3 giatSc trong t*rdngfo noi ddt thani mayini roi'raf iuo-JO"* di€u hod vcri ch* kv

-,['-i:

\!t3 Cf,u 10: B, .i3 r : C.3 r o il r

MQt con l6c don c6 chi6u ddi_l : 0,3m duoc treo vdo trdn I toa xe lira, con lic

bi kich

'dOng m6i th; brinh xe cia toa xe gAp ihdn6i g,gacria ciic il;;;;tit i;oaog crich gi*a z moi

n6i uy ld 12,5m, eia t6c trons truong,g : -;l- Bi€n d6 aao agng cta con lic ndy

ltyn nh6t hhi

dodrn tdu chuyen'dlng thing ia"

"oiTdi a9 ia:

*jt jpf]^ ,

^ P;

60 (km/h) c 11,5(km/h) D 12,s (km/h)

CAu.11:- MQt,ddng hd d6m giay, m5i'ngey d6m chgy nhanh i.:or phdi di6u,chinh d6 ddi cua con ld.c nhu th€ ndo so vdi etQ'dii hiQn tai ae dong h6 chay dring ? -;

A ,TEng 0,2o/o : =8 T-dlg ASyo C, Gidm 0,3% D Gi6m A,2ya

cau 12: gA ttti bidu di6n sF phu thugc cria van

tOc vio ly d0 cria I DDEH c6 dqng ,

A Dulng hinh sin B,.Dulng thing C Euong erip -D ild"; paraboi

Csu13:vatDDDH.c6.d6.th!.x(t).nhuhinhve Phuongtiinhdaod6ng'cta;'l;l

tZ tl ,-ir.r

A = scosf i+ff ri

iiJl Jr.i

C.,r = BsinlSi+;jr;n

D.r=acos{.iirr-li.ru

CAu t4: Mdt vdt DDEH theo phucrng trinh 't': 4 cos ("t +i)tt,t

Thoi gian ng6n nh6t dd v6t

CAu 15: Chqn C6u tri lcri.dring khi n,6i vA lgc cang cria ddy teeo con l6c dcrn: !

A Nhu nhau tai mqi vi tri :

B Lm nhdt tai VTCB vA I6n hirn trong lugng v6t

C Lon nh6t t4i vI9!

"l bing treng t"sne Gi

t

D Nhd nhdt tai VTCB vd nh6-hon iq"g r,;q,rl uat : '

CAU 16: MQt v4t thgc hi€n I dao {0ne tit din, cr? sau m5i chu lr} bien d0 giam z% phdn

ndng luqng cua con lic m*t di sau'm5i dao dgng todn ph6n Id:

CAu 17: Tai noi

:6 $iu tdc trgng tniong g, I con lic don DEDH voi bi€n dQ g6c o" L6y m6c

i

the nang o vi tn cal

lang.-!f$ g9n ldc'chuy€a dpng cha-m ddn theo chidu drn dln vi tri c6 dqng ndng blng 3 lAn:thti nang-tfri li dQ g6c cira lon tt; ;y birg, ' - -

I

4 {,

a

f(o

C.-z cdu 18: Mdt con lic lo xo DDEH vcri chu k! T vd bien d6 l0cm

thoi gian d€ vdt nh6 cua con lic co d6 run van r6c kh6ng vuor qud

dQng cua vat lA:

A.0,5Hz: r' tz",

D

Bi€t trong J* cm/s ld

u kj'khoing Tin rO duo

2

ch

T

a

J

l.-I) ,: "'

1

B.4.0Hz

- CAu 19: Dti 2 song giao thoa dugc voi nhau thi cliirng phii c6 cing t6n sd vd :

- 'A Cirng bi6n d6, cung pha

B Ctng bi€n dQ vd hipu s6 pha khdng ddi theo thdi gian

C Cirng pha

D Higu si5 pha kh0ng ddi theo thcri gian

Cf,n 20: Chgn Cdu dring: Chu kj's6ng:

A La chu lcj' chung cria c6c phAn t& khi c6 s6ng truyAn qua

B Lq thcri gian phin tu chuy€n dQng l, qudng ducrng bing I budc s6ng

C Bdng nua chu -t cria ngudn phrit s6ng

D.CeAvdB

Ciu 21: SSngphanx4:

A Ludn lu6n biAOi adu so vcri s6ng tdi

B Bi aOi adu khi bi phe1 x? tr0n I vflt cin cO ainfr

C Ludn lu6n l*rdng bi ddi ddu

D B! AOi a6u khi bi phdn x4 tr0n 1 vflt cin di dQng dugc

Cfru 22: Ba di€m 0,4,8 cuttg nim tr6n I nria duong thing xu6t ph6t tu 0 Tai 0 dat I ngudn di6m phSt s6ng 6ni cting hucmg ra khdng gian, mdi trudmg lihQng h6p thg 6m Mric

"oong aq

6m tgi A lA 40d8, t4i B la 20d8 Mric culng d$ nm tai tmng di0m M cria doan AB li:

Cf;u 23: O m{tthodng cta I chit l6ng c6 2 ngudn ktit hqp A vi B c6ch nhau 10cm, dao dQng

theo phuamg thdng tlirng vgi phuor1g trinh ue:Zcos4oiif vd ua =2cos{*0ni+'.ai trong d6

u;(mm), gs(mm), t(s) TOc d$ truyfr s6ng tr€n m{t chit long ld 30crn/s Xdt hinh vu6ng

AMNB thuQc m{t &o6ng chit l6ng Sd Oiem dao d$ng vsi biOn dQ cgc d4i tr€n dopn BM ld:

Ciu 24: Trong thi nghi$m giao thoa tr€n.m{t nufc, 2 ngu6n t6t trqp Ad duo dQng cing pha

vtri tin sO 30H2, AB'-i 8c'm, ti5c d0 truyAn s6ng tr€n mit nudc ld 30cmls.,M$t dudrng trdn c6

tdm li trung.dii5m cfia AIi, nim tr€n m{t nudc, c6 bAn ki",!,,3 cm,,S5 ditSm dao dgng'voi bien

CAu 25: Hai ngudin s5ng tr0n mflt nudc Sr,Sz cdch nhau 7-1 (2 li bu6c 16rg) ph6t ra 2 s6ng lAn luqt ld lr' - ssinidt vd'u" :acos.l.rr, s6ng khdng suy gi6m Ei0m M nim d mit nudc, tr€n dudrng trung truc cia SrSz, gin nh6t dao dQng cirng pha vdi 51 ,cdchS1"i kho?ng:

A.3ls

]-:

8.33a

)

C.258 |

,i

D.324

CAu 26: MQt sqr diy kirn logi clng gita 2 diiim c6 dinh cdch nhau 1,2m EAt I nam chdm

di-en lai gan sqr dffy, khi cho ddng di$n xoay chiAu tin s0 50Hz qua nam ch6m thi tuen sgi dAy

quan siit dugc s6ng dirng vni 3 bUng s6ng Vfln tOc truy€n s6ng trOn ddy ld:

Ciu 27: S6ng diQn tu li qu6 trinh lan truydn trong khdng gian cria mQt dign tu trubng bi6n thi6n K6t lqnnio sau aay fa sai khi n6i vd tuong quan gitu F vA F cta die1r't& trudrng d6:

A F vd E Uiiin thi6n didu hda voi ctng tAn sd

-B .T vi 3 dao clOng theo 2 phuong vudng g6c vcri nhau

C .9 vd 9 dao dOng cirng pha

D f: I' 3 theo thft t.u tao thdnh mQt tam di€n thuan (i' ld van toc truyin s6ng)

Ciu 28: Nguy€n t6c cria mach chgn s6ng trong mdy thu thanh duoc dua vAo hi0n tugng :

A Giao thoa song B" C6ng hudng di$n tu C Nhi€u xa D S6ng dimg

CAU'29: MQt rn4ch dao dong tii$n

f-r ly tudng dang dao.dQng.tg do Tqi th6i di€m r = 0 di€n tich tr€n 1 tran tu tli6n cuc dii- sau khoang tr,;i gion rig*n nh6t iO-bs thi dign tictr tr.€n ban iu:

na,v bdng nria gi6 tri cuc eai ihu k;', dao a0]-,g ri€ng cfia m4ch dao dong ndy rd:

A.4.i0-6s B 6.i0 6s - Y 'D',

i : t0* D i2 l0_6s cflu 30: Trong ih6ng rin lien lac bing so'g v6;t61;F1{oi ta su dung crich bi6n digu

bi6n d6' tuc Id ldm cho bi6n dd cria sdng diQn tJ "o

1i" lqeira ,ong Lu'g) bi6n thi€n theo thcri

gian v'ei tan to bing tan sd cua aao iqng a* ta" cr.o i"an J J.'!o"g mang Id i 000 kHz Khi

"^" ,a,',r,i"

D 1600

cau 31: Trong dao d6ng di6n, dai lurr*-e tuong *g uoi tuc h6i phuc

"u""*""JJ"g c,li:

D.i

cau 32: Mfc giira 2 bdn r-u t higu diQn th6 *ouv'"iieu, ta x6c dinh duoc gia ,.j tric thdi crra hi€u di0n th6 vd cuong d6 dong di6n vdo thcri ditlm r, ia ,, I6J;C iD, ir: rTA; Vdo rhcri diiiin

t2 iii ur : 60r'? (V), ir:v?A Dung kh6ng

cria tu dign c6 gi6 tri: ' j

D.30t? g CAu 33: cho mach'diqn RLC mic n5i ticp, tin si;; dong diqn rd ritri"rg,l day.thudn

cirn, c:1}412q (F), R

= 50o€ fi -.D€'hit,;,r1i€n'thti, gi*a 2 dau tir di€n igch prru i so vrii hidu di€n thil g;,tra'zda;;?;h ai+" iirir c6 gi6 tr! : 5rL1{1 z uilu tlr n19r

A s/2n {H) B 3i2tr {H) C t/?n {H) s j/zn {H) :

CAu 34: MOt den dng duoc mic vd,o t hi€u a;en thj x"'_ii

"fria I lOV_ 50H2 Ddn chi s6ng

*:uU lmr hi$u diqn th6 firc thni kh6ng nh6 ircrn 77,Bv.Thoi

gian aJn ,a"g ffong ts ld : ,

1:

t Htr thay d6i

: f3", tdn r6i gi6m "uong : :

Cdu 36: Mach di€n xoay chiiiu ntii tiiip c6 tin J r: fogr g6m cu6n ct6y thuAn ,a* L,i,cign trd thuan B:16g*6n vi tu di€n c Thay d6i do ru cam r tu tt 6y khi L : L1 vd I- :2L1 ihi

Sffi;ili cdng sudt nhtmg cuons d6 dong dign thi l6ch pha nhau pha ni,uu l Didn dung

-3.1G-4 lo-1

A' cflu - r (F) 37: Dat I di$n 6p xoav B a-_, chiAu co hi€u didn (F) c rie - nieu u tol a,)"j H,ong thay o d6i rt_ trl

'do 2 dAu mach

dien RLC m5" n6i tidp thi tirdv,h;cu aier trre ile; il;g ,r.","-:i" ptian t* R,L,c da bing nhau

vd bing 100v N€r.r tdn*s6; ;;;;#fil;;,;il;?'; rh6 hi€u duns tr€n R ld:

D 20av Cf,u 38: Cho mach di$n: i: - : llcr?s:n 100- :ii.'), cuon

ddy thuin c6m c6 L : * H Thay d6i

R d6 UAM khong thay Jo,:, lJ" oo C co giri r.i l;, '' vuv

10*;

a r, (Fl

10 -;

c lf(F)

lo-3

f +" (F)

t 0-:

D Irr (F)

-Cf,u 39: MOt doan mach diQn xoay chiiu mic ndi ti€p g6m I bi6n trd R, I cu6n d6y thuAn c6m

L vd 1 tu difu C Dat yio 2 dAu doan mach i hi€u dien thd xoay chiAu co uien 6O;;;a" ,6 khdng ilray d6i Khi diAu cirinh bi6n trd R, thi ttr6y cong wi, ti# rh"

"61l;;;:* uut

P' d gi6 tri cta bi6n tr& bing R".,: 40 a c6 2 gt6, tri cria UiCn trO bing R; vd & "ilil;Iirie"

thir bang nhau vd nho hcrn P* Ntiu R1 : 80 a ihi R, le,

A.20n

khung li :

A 3r cos(60ni - rif 6^] l!

c l0a

C l00rg V

, B 3,r cos(6gni - ii/3J [''

D 300v

cAu 40: Tai thoi di6m t, diQn dp u=l00t5cos(ioot'r+;)F

c6 gi6 trl toou6 v vd dang

gi6m Sau thcri di€m dd l/200s, dign rip hdy co gi6 fi ld:

Ciu 41: Vdo ctng I thoi di€m ndo d6 2 ddng di$n xoay chidu fr: locosic.,f +prr vi

.'i11,

ji:locosi irrr-rqpr:) c6 ctrng

916 d tuc thcri T-, nhmg I ddng di$n dang tdng cdn I ddng tliQn dang giim Hai ddng di€n l€ch pha nhau:

CAu 42: Dgt di$n 6p xoay chiAu c6 gi6 tri higu dung U : 100t'r V vio 2 diu doqn mgch RLC c6 L thay doi duo c Khi di-tn 6p fJr*u* thi Uc :200v Gie tri cta fJ1*u* ld:

CAu 43: Trong hQ th6ng truyen tii ddng dign 3 pha di xa theo c6ch mic hinh sao rhi:

A Cudng dQ ddng cli€n trong qrr-Qn de){ Eung hoi ludn ludn bing 0

B Hi$u 'di€n th6 hiQu deng gita 2 dAy pha lon hon hi€u diQn iire nieu dung gitra d6y pha vd ddy trung hda.

2t:

C Ddng di€n trong rn6i aay pha d€u lgch pha r so vcri hi€u di€n th6 gita ddy pha d6 vA d6y kung hoi

D Cuong d9 dong dign trong day trung hod bing tdng c6c culng d6 ddng rti€n

c5c ddng diQn trong 3 d6y pha

hi$u dUng cta

CAu 44: Mgt khung ddy quay tldu trong tu trudrng F vu6ng g6c vcri tryc quay vcri ttic dO lg00

v6ng/phrit Tai thoi tliiim t: 0 vdc to phdp tuy6n

thdne cuc dai qua khuns ddv ld 0-05Wb Bi6u thric

cria khung hqrp voi I mQt g6c 300 Tir su6t dien dQng cirn img xu6t hign trong thdng cgc d4i qua khung ddy ld 0,05Wb Bi6u thric

C.30; cos(3Qn't:+;roi6.i I D 3n' cos(30;rr *.'rlJ.) t

Ciu 45: JvIQt dQng co di$n kh6ng ddng bQ 3 pha c63 cuQn diy gi6ng h6t nhau mfc hinh sao.

M4chdign 3 pha dtrng diS chgy dQng co ndy phii c6 sii aay ddn

Ciu 46: rvrOt 4019.ll,96"g aOls U9 3 pha a6r1

!re9 hinh sao vio m4gg diQn 3 pha c6 hiQu di€n thi5 ddy 190V, biStddng ccr ti6u thp

"bng r,r6t 3,3kw, h0 sO c6ng su6icna d6ng co ld 0,8 .

Cucrng dd ddng diQn hi€u dpng ch4y trong I cudn ddy cria dQng co ldl

CAu 47: Ph6t bi6u ndo sau ttAy ld sai: Trong dOng co kh6ng ddng bQ 3 pha :

A Tdc ttQ g6c ctia rdto lu6n nh6 hcrn tAn iO gO" cna ddng dj€n va bang tdc iIQ g6c cria tu truong quay

1.19 d9 g6c.cua tu trunng quay lu6n bing tAn s6 g6c cta dong di€n

_C TQc d0 g6q cua roto lu6n nho hcrn tdn s6 g6c cua dong di6n

D Tdc ilQ g5c cua roto nho hern tdc d0 g6c cua tir trucrng quay

ciu 48: cho mach diQa xoay c!]cu (nh.'u hinh yal x_chria hai trong ba ph6n ttr (diQn trd

t!1a3_cu0n d6v thuin cdm, tit diQn) ;i

"ai'iril ;#;

"* :200v, rJev : r50v, ur"m :

50V Cdc pnan trr trong mgch X le

A, Dign trd vd cuQn ddy.

B Dign tr& vA rq di0n.

C Cu$n ddy vd t9 dign.

D Chua dri co sd d6 k6t lu6n.

cAu a9: Det di$n 6p xoay chi€u u = 1?0t'?cos{rggrr} ir vao hai ddu dogn mgch RLC

kh6ngphdn nhrffi c6 t6ng tr6li 6015ft Ei€n lugng chuy6n qua ti€t diQn phdng cda d6y

d6n trong

J cnu k' k6 ru khi ddng di6n triQt ti€u

a.*rcl l00n'' s -'100r'-'' *tcl c.*r"1 50n'' D o.

cf,u uo"jij:-::t

_1r:{ :H6: c6 diQn aq hilu dlrng khong d6i, tan so thay d6i duqc vao hai d6u doqn msch RLC m6c ooi u6plc"do aivTnr6" A;; Khi f :4 ini u, _.- khi

f :tff U.,,", Khi p** ttri tan s6 cria ddng dicfi Ia ' Lma _ :::1

A Sl,

-DAP nn oE rHt rHu gal n c t-Ar'r r ruON vnr li

Ciu I

eau s

Cau io

cau Ti

Cau it

cdu tg

Ciu 14

cau i5

-eau i6

Cau ti

Cau tg

CAu i9

Ciu 20

Cau zi

ceu ii

Ciu 23

G6u 24

Ma

d6-CAU 1

Cau z

Ciu 7

101

C b D A

B B

A

B

A

B c D A

B

.A

B

A

A B C B

A

B

B

D

B

B c

A

i r'l

c B A

B

B C

C

A

B

A

D

B

B

A

C

A

B

102

B c

A

D

A

A

D

',A

b

D

A

B-

D- i.:

F_

lt , ,C ,.,.

A

c ; ,.'

'; C.-.'

B

B

c

A

B

B

C A

C.

:: D

A

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c B

A

D

A

c c

A;

D

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A |

A .::

103 D C B D D

e

A

c

A-A B D

B:

B

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D,'

b

B

c

D

B A

D

c B

c

D

D B

A

D A A

c

D-B B

D:

B

A A

B D D

A

D B C

c c

D D B

A

Ciu 25

Cau eo

CAU 27

G6u 28

Cau eg

Giu 30

Cau rr

Giu 32

Giu 33

Giu 34

Gdu 35

Ciu 35

Giu 37

Ciu 38

Giu 39

Gdu 40

Ciu 41

CAU 42

Giu 43

Giu 44

Ciu 45

Ciu 46

CAU 47

C3u 48